I just started road cycling in 2005 after buying a Giant TCR C3. The bike came with 105 component group (except for a Tiagra front derailleur). I rode bike recently with Ultegra shifters and find them a lot more ergonomic. I'm planning to upgrade my shifters to Ultegra and have some questions.

1) Does the Ultegra 10 speed shifter work with the Shimano 105 - 9 speed rear derailleur?

2) Will the Ultegra 2 speed front derailleur work with the 105 - 9 speed rear derailleur? I think I need braze on's. I'm assuming so since I don't have any clamps on my front derailleur).

Other details on my set up - Compact crank (34 / 50). Rear cassette - 12/26.

Any advice will be very helpful.